14 s. GOTO : 



" EcmarJcs. — Attention may be drawn to the occniTeuCv^ of this species 

 at 250 fathoms (Station 200), for it is, so far as I am aware, the gi-eatest 

 depth at wliich Arcliastcr tjjpiciis lias been found. I can detect no differences 

 worthy of remark between tlieso examples and specimens from shallow Avater. 

 " It is interesting to note that amongst this series from station 200 

 tliere are two examples which are x)rovided here and there with short, conic- 

 al, robnst, stunted spinelets, standing upright on the upper margin of the 

 supero-marginal pktes. These spinelets are quite irregular in their oceiu- 

 rence. In one of the examples less than a dozen are x^resent on tlie whole 

 starfish, but in the other case they are much more numerous. In this example 

 it is also to be remarked that the lateral walls of the rays are much more 

 vertical than in the other specimens from this locality, the supero-marginal 

 plates being less l^eveUed or arched towards the abactinal sm-face, with 

 wliich the lateral walls consequently forms a more angular junction, resembl- 

 ing in this respect the character of ArcMster awjiilatus. In all other 

 respects this interesting specimen is an extremely well-marked example of 

 Archaster typiciis. 



" LÙTKEN ^' lias x^laced on record the x^resence of occasional sx)inelets on 

 the sux^ero-marginal x^lates of this sx^ecies, and it ax^x^^^i'^^^^ ^^ ^^'^ "^ frequent 

 occm-rence in the large series of examx^les from the Nicobar Islands studied 

 by him. Tln-ough his kindness I had the opportunity of examining a 

 remarkably fine exjimx^le from Billiton in the Natm-al History Museiun of 

 Copenliagen, in which from four to six sx)iuelets were x^resent on each side 

 of a ray. In the Museum at Leyden are examx^les from Java and the 

 Togean Islands (N. E. of Celebes) also similarly characterised, and this form 

 has been named in manuscript by Professor C. K. Hoffmann xirclimler typlcus, 

 \i\x. multlsplna. The presence of these spinelets on the sux)ero-marginal x>lates 

 is so very irregiüar and sx)oradic, and seems to me to be uiiaccomx)auied by 

 any other character of sufficient imx)ortance, that I fail to ax^x^i'^ciate the 

 necessity of ranking the examples in question as a named variety. 



*' The normal comxx)sition of the adambulacral armature in this species 

 is : — (1.) A fmTow series of tlu'ee spines, the middle one much in advance 

 1) LÜTKEX '64, p. 135. 



